Center plate vertical wear ring

ABSTRACT

The present invention involves a wear ring which fits in the recess of a truck bolster center plate to protect the inner annular wall of the recess. The annular wall has a double taper which first tapers outward a distance from top to bottom and then tapers inward a part of the distance. The ring has a double tapered outer surface from top to bottom which is complementary to the interior wall of the recess.

United States Patent [191 Amwake Sept. 3, 1974 1 CENTER PLATE VERTICALWEAR RING [75] Inventor: Harvey Edward Amwake, West Falls, NY.

[73] Assignee: Dresser Industires, Inc., Dallas, Tex.

[22] Filed: June 27, 1973 [21] App1.'No.: 374,193

[52] US. Cl. 105/199 C, 308/137 [51] Int. Cl. B611 5/16, F16c 17/04,Fl6c 41/00 [58] Field of Search 105/199 C, 199 CB;

[56] References Cited UNITED STATES PATENTS Allison 308/137 Pivon308/137 X 3,083,065 3/1963 Hinks et a1 308/237 3,218,989 11/1965 Kreineret a1. 105/199 C X 3,599,574 8/1971 Robertson 105/199 C PrimaryExaminer-M. Henson Wood, Jr. Assistant Examiner-Howard Beltran [5 7]ABSTRACT 4 Claims, 3 Drawing Figures CENTER PLATE VERTICAL WEAR RINGVertical ring wear liners presently used in truck bolster center bowlshave parallel and vertical walls which are generally secured by acircumferential weld at the top inside and by a perpendicular weld atthe ends.

However, the male car body bolster center plate rocks in the truckbolster center bowl laterally and longitudinally in such a manner that avertically downwardly force is imposed on the vertical ring wear lineron the low side and a vertically upwardly force is imposed on thediametrically opposite high side. These loads contribute to weldcracking and subsequently, the vertical ring wear liner tends to rise inthe truck bolster and works out of the female recess which leads torapid wear of the truck bolster rim and cracking of the rim and/or ring.The result is high destructive forces which are imposed on the truck andcar body bolsters due to the uncontrolled action of the center plateinterfaces.

Accordingly, it is among the objects of the invention to provide aself-locking wear liner ring that requires no weldment around the topthereof. In the drawings:

FIG. I is an elevation view in cross-section of a portion of a railwaycar showing the wear liner or ring in position between the mating centerplate of the car body bolster and the truck bolster center bowl;

FIG. 2 is a plan view of the center plate area of the bolster, showingthe wear lining of FIG. 1 after being welded in position; and

FIG. 3 is an elevation view in cross-section of a portion of a railwaycar showing a modification of the wear ring liner.

In accordance with the present invention, there is provided a railroadcar comprising a car body bolster assembly supported on a car truckbolster assembly by means of a circular body bolster center plate bossmating with a circular bowl or recess having an interior annular wall inthe truck bolster. A circular wear ring is disposed within the recess inabutment with the interior wall. The interior wall contains a doubletaper in different directions from top to bottom and the ring contains adouble tapered outer surface complementary to the interior wall.

The wear liner [0, as shown in FIGS. 1, 2 and 3 is located within thetruck bolster center bowl 12. The liner is in the form of a split ringthat is continuous around its circumference except for a gap 14 therein.As shown in FIG. I, the ring has a regular cylindrical inner sur face 16and an outer surface 18 that contains a double taper from the top to thebottom. The ring is generally formed or fabricated from a wide range ofalloy or carbon wear resistant steels.

The inner wall 20 of the recess is first tapered outwardly a portion ofthe distance from the top to the bottom and then tapered inwardly aportion of the distance. Both tapers are shown to be substantiallyequidistant and this is preferable. The drawings also show that thetapered surfaces meet at an obtuse angle. However, the tapered surfacesmay be joined by a vertical wall portion 22 if desired.

. The liner 10 is fitted within the circular recess 24 of the centerbowl around the periphery thereof and is in abutment with the interiorvertical wall 20 of the center bowl. This is accomplished by merelycontracting the ring, placing it in the recess and allowing it to snapinto position. As shown in FIG. 2, the ring is then welded at the gap 14to the interior annular wall. When the vehicle is assembled, thevertical surface of the male body center plate boss 26 fits with theliner to protect the truck bolster center plate wall 20 from wear. Sincethe vertical ring forces are-both up and down, the double taper fitbetween the ring and truck bolster rim will limit ring movement andinsure control of the wear and working clearances at the car truckinterface thus providing for long maintenance-free life. Owing to thecontruction of the ring, welding around the top could be eliminated ifdesired.

Having thus described the invention in detail and with sufficientparticularity as to enable thoseskilled in the art to practice it, whatis desired to have protected by Letters Patent is set forth in thefollowing claims.

The embodiments of the invention in which an exclusive property orprivilege is claimed are deficed as follows:

1. In a railroad car comprising a car body bolster assembly supported ona car truck bolster assembly by means of a circular body bolster centerplate boss mating with a circular bowl having an interior annular wall,the improvement comprising a circular wear ring disposed within saidbowl in mating relation the interior wall, said interior wall having adouble taper forming a concave configuration being first tapered outwarda portion of the distance form top to bottom and then tapered inward aportion of the distance, said ring having a gap therein and having adouble tapered convex outer surface from top to bottom complementary tosaid interior wall and an inner surface mating with the center plateboss.

2. Car of claim 1 in which the inward and outward tapers aresubstantially equidistant.

3. Car of claim I in which the tapered surfaces meet at an obtuse angle.

4. Car of claim 1 in which the tapered surfaces are joined by a verticalwall portion.

1. In a railroad car comprising a car body bolster assembly supported ona car truck bolster assembly by means of a circular body bolster centerplate boss mating with a circular bowl having an interior annular wall,the improvement comprising a circular wear ring disposed within saidbowl in mating relation the interior wall, said interior wall having adouble taper forming a concave configuration being first tapered outwarda portion of the distance form top to bottom and then tapered inward aportion of the distance, said ring having a gap therein and having adouble tapered convex outer surface from top to bottom complementary tosaid interior wall and an inner surface mating with the center plateboss.
 2. Car of claim 1 in which the inward and outward tapers aresubstantially equidistant.
 3. Car of claim 1 in which the taperedsurfaces meet at an obtuse angle.
 4. Car of claim 1 in which the taperedsurfaces are joined by a vertical wall portion.